PRECAUTION
- HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM The vehicle is equipped with SRS (Supplemental Restraint System) such as airbags. Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident. Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for the Supplemental Restraint System (See «PRECAUTION»(ref-289738-S29050143872008070700000) ).
- HANDLING PRECAUTIONS FOR STEERING COLUMN When handling the steering column assembly. Avoid any impact to the steering column assembly, especially to the motor or the torque sensor. Replace the steering column assembly with a new one if it is dropped or subjected to any severe impacts. Do not pull the wire harness when moving the steering column assembly. Hold the motor and housing section when carrying the steering column assembly. Do not hold the shaft or the tilt lever so as not to damage the steering column assembly. After replacing the steering column assembly or power steering ECU assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate torque sensor zero point (See «CALIBRATION»(ref-289766-S09499824942008070700000) ). When disconnecting or reconnecting the connectors: When disconnecting connectors related to the electronic motor power steering system, turn the ignition switch ON (the engine is stopped), center the steering wheel, turn the ignition switch off, and then disconnect the connectors. When reconnecting connectors related to the electronic motor power steering system, make sure that the ignition switch is turned off, center the steering wheel and then turn the ignition switch ON (the engine is stopped). NOTE: Do not turn the ignition switch ON without the steering wheel being centered. If the above operations are not carried out correctly, the steering center point (zero point) will deviate, causing a difference in steering effort between right and left turns. If there is a difference in the steering effort between right and left turns, perform the steering center point adjustment (zero point calibration) (See «CALIBRATION»(ref-289766-S09499824942008070700000) ).
Steering system
| Symptom | Suspected Area | See |
|---|---|---|
| Heavy steering | Front tires (Improperly inflated or unevenly worn) | TIRE AND WHEEL SYSTEM |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Front suspension (Lower ball joint) | INSPECTION | |
| Steering intermediate shaft | REMOVAL | |
| Steering column | REMOVAL | |
| Steering gear | REMOVAL | |
| Power steering ECU | POWER STEERING ECU | |
| Poor return | Front tires (Improperly inflated or unevenly worn) | TIRE AND WHEEL SYSTEM |
| Front wheel alignment (Incorrect) | FRONT WHEEL ALIGNMENT | |
| Steering column | REMOVAL | |
| Steering gear | REMOVAL | |
| Power steering ECU | POWER STEERING ECU | |
| No free play or excessive play | Steering intermediate shaft | REMOVAL |
| Steering gear | REMOVAL | |
| Knocking (or clunking) sound occurs when steering wheel turned while power steering in operation | Steering intermediate shaft | REMOVAL |
| Front suspension (Lower ball joint) | INSPECTION | |
| Front axle hub (Hub bearing) | FRONT AXLE HUB | |
| Steering gear | REMOVAL | |
| Friction sound occurs when steering wheel turned during low-speed driving | Power steering motor | REMOVAL |
| Steering column | REMOVAL | |
| High-pitched sound (squealing sound) occurs when steering wheel turned slowly with vehicle stopped | Power steering motor | REMOVAL |
| Steering wheel vibrates and noise occurs when steering wheel turned while vehicle stopped | Power steering motor | REMOVAL |
| Steering column | REMOVAL |
SYMPTOMS REFERENCE
Scheme 36
- CHECK STEERING WHEEL FREE PLAY Stop the vehicle and align the tires facing straight ahead. Turn the steering wheel gently right and left, and check the steering wheel free play. Maximum free play: 30 mm (1.18 in.) If the free play exceeds the maximum, check the steering system (See «STEERING SYSTEM»(ref-289767-S23791668202008070700000) ).
